GENERAL DESCRIPTION

The AD7886 is a 12-bit ADC with a sample-and-hold amplifier offering high speed performance combined with low power dissipation. The AD7886 is a triple pass flash ADC that uses 15 comparators in a 4-bit flash technique to achieve 12-bit accuracy in 1 µs/750 ns conversion time. An on-chip clock oscillator provides the appropriate timing for each of the three conversion stages, eliminating the need for any external clocks. Acquisition time of the sample-and-hold amplifier gives a resulting throughput rate of 750 kHz/1 MHz.*

FEATURES

750 kHz/1 MHz Throughput Rate

1 μs/750 ns Conversion Time

12-Bit No Missed Codes Over Temperature

67 dB SNR at 100 kHz Input Frequency

Low Power—250 mW typ

Fast Bus Access Time—57 ns max

APPLICATIONS

Digital Signal Processing

Speech Recognition and Synthesis

Spectrum Analysis

DSP Servo Control